RHEL 9 must be configured to disable USB mass storage.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-258034	RHEL-09-291010	SV-258034r926089_rule		Medium

Description
USB mass storage permits easy introduction of unknown devices, thereby facilitating malicious activity. Satisfies: SRG-OS-000114-GPOS-00059, SRG-OS-000378-GPOS-00163, SRG-OS-000480-GPOS-00227

STIG	Date
Red Hat Enterprise Linux 9 Security Technical Implementation Guide	2023-12-01

Details

Check Text ( C-61775r926087_chk )
Verify that RHEL 9 disables the ability to load the USB Storage kernel module with the following command: $ sudo grep -r usb-storage /etc/modprobe.conf /etc/modprobe.d/* blacklist usb-storage If the command does not return any output, or the line is commented out, and use of USB Storage is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.

Check Text ( C-61775r926087_chk )

Verify that RHEL 9 disables the ability to load the USB Storage kernel module with the following command:

$ sudo grep -r usb-storage /etc/modprobe.conf /etc/modprobe.d/*

blacklist usb-storage

If the command does not return any output, or the line is commented out, and use of USB Storage is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.

Fix Text (F-61699r926088_fix)
To configure the system to prevent the usb-storage kernel module from being loaded, add the following line to the file /etc/modprobe.d/usb-storage.conf (or create usb-storage.conf if it does not exist): install usb-storage /bin/false blacklist usb-storage